[issue36279] os.wait3() leaks some uninitialized stack when no processes exist

[Roundup Robot]

Change by Roundup Robot <devnull at psf.upfronthosting.co.za>:


----------
keywords: +patch
pull_requests: +12278
stage:  -> patch review

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36279>
_______________________________________